I use a couple of them on rifles. I have a Nikon 1x20mm, (2) Thompson Center Hawkins 1x32mm and (2) Traditions 1x32mm on different rifles. All of them work just fine. The Nikon and Thompson Centers were about the same cost. I picked up a Traditions for $50.00 and so far it is working great. I got it at a little store near me.